toxicity

The eff ects of natural factors (temperatures +34°C and +20°C) and anthropogenic xenobiotics (1,2,4-TriH; 1-(CH3 SO2 )-1H-1,2,4-Tri; 4-(PhSO2 )-4H-1,2,4-Tri; 4-(TolSO2 )-4H-1,2,4-Tri) on watercress Lepidium sativum L. was studied. For this, 4 series of experiments were carried out. In the fi rst two series, the eff ect of concentrations was studied: 0.001, 0.01, 0.1 mg/ml during germination at diff erent temperatures for three days.

The complex estimation of toxicity of the polymer compounds – poly azolidin ammonium, modified hydrate ions of iodine, which has high antimicrobial activity was held. It is established that working concentrations of parent drug and its variants with different hydrate ions of iodine content do not cause death of biotestobjects of Daphnia magna Straus.

Еcotoxicological evaluation of two new polyheterocyclic compounds was spending. Acute toxicity of test substances, their lethal and safe concentration (LC and BC) were determined. The nature of the biological effect of these compounds on the plants was investigated. The substances were stimulants during the germination of seeds of wheat and peas and inhibitors of the growth of the roots and stems of seedlings. It was determined the effect of various concentrations of tested compounds on the growth characteristics of plants.

This work is about the investigation of the interaction of porous silicon submicron particles with the HeLa cervical cancer cell line. Substrates of the porous silicon were obtained with the two-staged chemical method based on synthesis of silver nanoparticles from silver nitrate AgNO3 with the subsequent etching with fluoric acid HF in the presence of hydrogen peroxide H2O2 and mechanical separation of microparticles by shattering. The thickness of the obtained porous silicon layer measured by scanning electrom microscopy (SEM), was about 2 mkm.